Light stick



FIG. 1 is a front, top perspective view of a light stick embodying mynew design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a side view thereof as seen from the right-hand side of FIG.3;

FIG. 5 is a rear view thereof;

FIG. 6 is a side view thereof as seen from the left-hand side of FIG. 3;and,

FIG. 7 is a bottom view thereof.

CLAIM The ornamental design for a light stick, as shown and described.